Ultrasonic spot welded 6111-T4 aluminum alloy to galvanized high-strength low-alloy steel: Microstructure and mechanical properties

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• 作者：A. Macwan ; A. Kumar ; D.L. Chen ; ^{dchen@ryerson.ca}
• 关键词：Ultrasonic spot welding ; Aluminum alloy ; Steel ; Tensile strength ; Fatigue life
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：5 January 2017
• 年：2017
• 卷：113
• 期：Complete
• 页码：284-296
• 全文大小：5865 K
• 卷排序：113

文摘

Rapid diffusion occurs between Al and Zn coating on HSLA steel during USW. A characteristic diffusion pattern forms at higher welding energy levels. Squeezed-out AlZn eutectic and Zn exhibit a brazing effect. Tensile lap shear strength is higher in Al-to-galvanized steel than Al-to-Al joints. Fatigue life is longer in the joint made at 2000 J than that made at 1000 J.